.\" $OpenBSD: BIO_get_ex_new_index.3,v 1.17 2023/11/19 10:26:36 tb Exp $
.\" full merge up to: OpenSSL 61f805c1 Jan 16 01:01:46 2018 +0800
.\"
.\" This file was written by Rich Salz <rsalz@akamai.com>.
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.Dd $Mdocdate: November 19 2023 $
.Dt BIO_GET_EX_NEW_INDEX 3
.Os
.Sh NAME
.Nm BIO_get_ex_new_index ,
.Nm BIO_set_ex_data ,
.Nm BIO_get_ex_data ,
.Nm BIO_set_app_data ,
.Nm BIO_get_app_data ,
.Nm UI_get_ex_new_index ,
.Nm UI_set_ex_data ,
.Nm UI_get_ex_data ,
.Nm X509_get_ex_new_index ,
.Nm X509_set_ex_data ,
.Nm X509_get_ex_data ,
.Nm EC_KEY_get_ex_new_index ,
.Nm EC_KEY_get_ex_data ,
.Nm EC_KEY_set_ex_data
.Nd application-specific data
.Sh SYNOPSIS
.In openssl/bio.h
.In openssl/ui.h
.In openssl/x509.h
.In openssl/ec.h
.Ft int
.Fo TYPE_get_ex_new_index
.Fa "long argl"
.Fa "void *argp"
.Fa "CRYPTO_EX_new *new_func"
.Fa "CRYPTO_EX_dup *dup_func"
.Fa "CRYPTO_EX_free *free_func"
.Fc
.Ft int
.Fo TYPE_set_ex_data
.Fa "TYPE *d"
.Fa "int idx"
.Fa "void *arg"
.Fc
.Ft void *
.Fo TYPE_get_ex_data
.Fa "TYPE *d"
.Fa "int idx"
.Fc
.Ft int
.Fo TYPE_set_app_data
.Fa "TYPE *d"
.Fa "void *arg"
.Fc
.Ft void *
.Fo TYPE_get_app_data
.Fa "TYPE *d"
.Fc
.Sh DESCRIPTION
In the description here,
.Vt TYPE
is used a placeholder for any of the OpenSSL datatypes listed in
.Xr CRYPTO_get_ex_new_index 3 .
.Pp
These functions handle application-specific data in OpenSSL data
structures.
Their usage is identical to that of
.Xr RSA_get_ex_new_index 3 ,
.Xr RSA_set_ex_data 3 ,
and
.Xr RSA_get_ex_data 3 .
.Pp
.Fn TYPE_get_ex_new_index
is a macro that calls
.Xr CRYPTO_get_ex_new_index 3
with the correct index value.
.Pp
.Fn TYPE_set_ex_data
is a function that calls
.Xr CRYPTO_set_ex_data 3
with an offset into the opaque ex_data part of the
.Vt TYPE
object.
.Pp
.Fn TYPE_get_ex_data
is a function that calls
.Xr CRYPTO_get_ex_data 3
with an offset into the opaque ex_data part of the
.Vt TYPE
object.
.Pp
.Fn TYPE_set_app_data
and
.Fn TYPE_get_app_data
are deprecated wrapper macros that call
.Fn TYPE_set_ex_data
and
.Fn TYPE_get_ex_data
with
.Fa idx
set to 0.
.Sh RETURN VALUES
.Fn TYPE_get_new_ex_index
returns a new index on success or \-1 on error.
.Pp
.Fn TYPE_set_ex_data
and
.Fn TYPE_set_app_data
return 1 on success or 0 on error.
.Pp
.Fn TYPE_get_ex_data
and
.Fn TYPE_get_app_data
return the application data or
.Dv NULL
if an error occurred.
.Sh SEE ALSO
.Xr BIO_new 3 ,
.Xr CRYPTO_get_ex_new_index 3 ,
.Xr RSA_get_ex_new_index 3 ,
.Xr X509_new 3
.Sh HISTORY
.Fn BIO_set_app_data
and
.Fn BIO_get_app_data
first appeared in SSLeay 0.8.1.
.Fn BIO_get_ex_new_index ,
.Fn BIO_set_ex_data ,
and
.Fn BIO_get_ex_data
first appeared in SSLeay 0.9.0.
These functions have been available since
.Ox 2.4 .
.Pp
.Fn X509_get_ex_new_index ,
.Fn X509_set_ex_data ,
and
.Fn X509_get_ex_data
first appeared in OpenSSL 0.9.5 and have been available since
.Ox 2.7 .
.Pp
.Fn UI_get_ex_new_index ,
.Fn UI_set_ex_data ,
and
.Fn UI_get_ex_data
first appeared in OpenSSL 0.9.7 and have been available since
.Ox 3.2 .
.Pp
.Fn EC_KEY_get_ex_new_index ,
.Fn EC_KEY_set_ex_data ,
and
.Fn EC_KEY_get_ex_data
first appeared in OpenSSL 1.1.0 and have been available since
.Ox 6.5 .
